Crystal: Tourmaline Chemical Composition: Fe2O3 NaFe3(Al,Fe)6Si6O18(BO3)3(OH)4 Detail: Black Tourmaline, also known as Schorl is a complex sodium iron aluminium boro-silicate hydroxide in the Tourmaline group. Hematite is an iron oxide mineral found worldwide. Origin: Afghanistan, Brazil, Madagascar
Crystal: Tourmaline Chemical Composition: Fe2O3 NaFe3(Al,Fe)6Si6O18(BO3)3(OH)4 Detail: Black Tourmaline, also known as Schorl is a complex sodium iron aluminium boro-silicate hydroxide in the Tourmaline group. Hematite is an iron oxide mineral found worldwide. Origin: Afghanistan, Brazil, Madagascar